BB HEAD

Casting Number	CID	Years	Valves	Comments
10045427				Pontiac/Chevy Aluminum, 91cc chamber Large Rectangle Port
10049875				Pontiac/Chevy Aluminum Small Rectangle port
10051128	454	90-94	2.19/1.88	72cc Bowtie Aluminum Rectangular port 400cc intake
10052902	427			Oval Port Open chamber
10101136	454	91-94	2.06/1.77	Open chamber Oval port
10101140	366/427	91-01		Oval Port Closed chamber
10114156	454	91-01		Oval Port Open chamber
10121033	454	78-88	2.06/1.77	Open chamber Oval port
10141279	454	96-01		Vortec 7400 100cc chambers Oval Port
10487052	366	77-90		Oval Port Open chamber
12352783	454	79-93	2.06/1.77	Open chamber Oval port
12363391				Oval Port Bowtie Aluminum Signature Series fits MKIV GenV GenVI 110cc chamber
12363401				Rectangle Port Bowtie Aluminum Signature Series fits MKIV GenV GenVI 118cc chamber
12558162	496	01 & UP		Gen.VII Vortec 8100 8.1L truck
12560241	454	98-01		Vortec 7400 100cc chambers Oval Port
12562932	454/502	91-95		Oval Port truck crate motor 118cc chambers
12562934	502	00 & UP		GenVI Marine
14011077	454	89-94	2.19/1.88	118cc Replacement Aluminum Rectangular port 295cc intake
14025175	454	83-93	2.06/1.77	Open chamber Oval port
14044861	454	89-94	2.19/1.88	106cc Bowtie Aluminum Rectangular port 380cc intake
14081044	454	86-90	2.06/1.77	Open chamber Oval port
14081045	454	78-87		Oval Port Open chamber
14081052	366/427/454	85-87		Oval Port Open chamber
14092359	427	86-89	2.06/1.77	Open chamber Oval port
14092360	454	85-89	2.06/1.77	Open chamber Oval port
14096188	454	87-94	2.19/1.88	118cc Replacement Rectangular port 325cc intake
14097088	502	89-date	2.19/1.88	118cc Replacement Rectangular port 325cc intake GEN V
14101398	454	86-90	2.06/1.77	Open chamber Oval port
24502585				Olds/Chevy DRCE 2 Pro Stock aluminum for blocks w/4.900" bore centers
330864	366/427/454	70-81	2.06/1.77	Open chamber Oval port
330865	366/427/454	70-84	2.06/1.77	Open chamber Oval port
330866	366/427	68-78		Oval Port Open chamber
330867	427	68-73		Oval Port Open chamber
336768	427	73-76		Oval Port Open chamber
336781	454	73-85	2.06/1.77	113cc Oval port
343771	366/427/454	68-85	2.06/1.77	Open chamber Oval port
343772	366/427/454	76-84	2.06/1.77	Open chamber Oval port
343783	454	75-78	2.06/1.77	Open chamber Oval port
346236	454	75-87	2.06/1.77	113cc Oval port
346238	454	75-87	2.06/1.77	113cc Oval port
352625	454	70-76		Oval Port Open chamber
353049	454	70-73	2.06/1.77	113cc Oval port
366765	427/454	73-84	2.06/1.77	Open chamber Oval port
3732791	348	58
3758379	348	59-61
3759256	348	58
3767738	348	59-61
3781147	348	60-61		High Perf
3795586	409	61		360HP
3814690	409	62-64		High Perf
3819333	348/409	62-65
3830817	409	63-65		340HP
3837731	409	63		High Perf Z-11
3852583	409	65		400HP
3856206	396	65-66	2.06/1.77	98cc Oval port
3856208	396	65	2.06/1.77	109cc Z-16/L-37 Rectangular port
3856213	366	66-70	2.06/1.77	Closed chamber Oval port
3856260	396	68		Oval Port Closed chamber
3872702	396/427	66	2.06/1.77	98cc Oval port L-34/L-35/L-36
3873858	396/427	66-67	2.06/1.77	109cc L-78/L-72 Rectangular port
3876875	427	66-70	2.06/1.77	Closed chamber Oval port
3904390	396/427	66-67	2.06/1.77	98cc Oval port L-34/L-35/L-36
3904391	396/427	65-67	2.06/1.77	107cc L-78/L-71/L-72 Rectangular port
3904392	427	67	2.19/1.88	106cc L-88/L-89 Aluminum Rectangular port
3904393	366	66-68	2.06/1.77	Closed chamber Oval port
3908952	427	67		Oval Port Open chamber
3909802	396/427	66-67	2.06/1.77	100cc Oval port L-34/L-35/L-36/L-68
3917215	396/427	67-69	2.06/1.77	100cc Oval port L-34/L-35
3917219	366/427	66-70	2.06/1.77	Closed chamber Oval port
3919840	396/427	67-69	2.06/1.77	107cc L-78/L-71/L-72 Rectangular port
3919842	396/427	68-69	2.19/1.88	106cc L-88/L-89 Aluminum Rectangular port
3931063	396/427	69-70	2.06/1.77	100cc Oval port L-34/L-35
3933148	366/396/427	69	2.06/1.77	122cc Oval port
3933149	427	69-70	2.06/1.77	122cc Oval port
3935401	427	68-76		Oval Port Open chamber
3946074	396/454	69-71	2.19/1.88	118cc L-88/ZL-1 Aluminum Rectangular port
3964280	427/454	66-70	2.06/1.77	Closed chamber Oval port
3964290	396/402/427/454	69-70	2.06/1.77	100cc Oval port
3964291	396/402/427/454	69-70	2.19/1.88	108cc L-78/L-71/L-72/LS-6 Rectangular port 325cc intake
3964292	454	70	2.19/1.88	109cc LS-6 Rectangular port
3965198	396	69	2.06/1.77	Open chamber Oval port
3975950	366/427	68-70	2.06/1.77	Closed chamber Oval port
3986133	366/427	70-85	2.06/1.77	Closed chamber Oval port
3986136	366/427	70-84	2.06/1.77	Closed chamber Oval port
3993820	402/454	71	2.06/1.77	113cc Oval port
3994025	454	71	2.19/1.88	118cc LS-6 Rectangular port
3994026	454	71	2.19/1.88	118cc LS-6 Rectangular port
3999241	402/454	72	2.06/1.77	113cc Oval port
473328	366	68-85	2.06/1.77	Open chamber Oval port
6258723	454	71	2.19/1.88	118cc LS-6 Rectangular port
6272292	402/454	71	2.06/1.77	Open chamber Oval port
6272990	454	71-94	2.19/1.88	118cc Replacement Rectangular port 325cc intake